The community case Trump talked about was an intubated patient transferred to UC Davis Medical from another undisclosed hospital, assumed to be in the SF area.

Davis instituted droplet control, but not airborne, within a day and airborne control after 4 more days. But...no special PPE, no special procedures for infectious disease presumedly at hospital number one or Davis.

Everyone who treated the patient at either hospital, or was involved in transport, are exposed.

And, the patient presumedly came from a community cluster. No China contact, or contact with China contact.